Refined viscous hydrocarbon oil



Patented Feb. 17, '1931 f UNITED STATES PATENT OFFICE 'rnomns n. noonns, or wnrrnw, INDIANA, nssrenon 'ro s'rnrnann on. courm,

- or wnrrmo, INDIANA, A oonrona'rron or INDIANA BEFINED VISCOUS HYDBOCABBON 011';

2H0 Draw1ng'., rlg ina1 application filed August 19,1826, Serial 110. 186,851. Divided and thlsappllcdtion filed liovemher'l, 1928, Serial No.

1o ly acid and their tendency to emulsify increases: It, has now been found that these defects in the use of such oils may be to -a substantial extent remedied by the addition to .such oils of very small proportions (in general, not more than 0.1%) of aromatic compounds in which a lurality of "hydroxyl groups are attached to t e ring. Among substances of this class which have been successfully employed for this purpose are pyrogallol, gallic acid, dibuitylresorcinoland hydroquinone. Thus, in be case of a fuming acid treated white distillate oil of about 80 sec. Saybolt viscosity at 100 F. which, without the addition of such a substance, increased in acidity from 0.01 to 25 mgm. KOH equivalent per gram of oil in 100 hours and markedly decreased in demulsifiability, when oxygen was passed therethrough at a temperature of 100 0., the same oil to which 0.04% pyrdgallol had been added showed no increase in acidity and no decrease indemulsifiability The addition of,

0.002% gallic acid and of 0.05% dibutylre' t, I sorcinol, under similar circumstances, pre-' 85 vented any but relatively sli ht changes in under like conditions.

acidity, and demulsifiability. bus, the same oil containing 0.002% gallic acid showed an increase in acidity in 161hours to only 2.5

mgm. KOH equivalent per gram of oil.

general 0.1% or. less is suflicient to-produce a marked result.

The oils preparedin accordance with the 4 present invention have the taining their electrical. resistivity to a high 1 degree on aging. P

property of re- 1 claim:

The pro ortions; of the aromatic com-' pounds. ad ed maybe varied considerably.

817,882. Renewed July 31, 19:0.

of highly refined viscous hydrocarbon oils,

which comprises adding thereto a small proportion of an aromatic compound having a plurality of hydroxyl groups attached to the ring. r

2. Th method of preventing acid formation and increase of emulsifiability in use of highly refined viscous hydrocarbon oils, which comprises adding thereto up to 0.1% of an aromatic compound having a plurality of hydroxyl groups attached to the ring.

'3. .The method of preventing acid formation and increase of emulsifiability in use of highly refined .viscous hydrocarbon oils, which comprises adding thereto a small pro portion of pyrogallol.

4. The method of preventing acid formation. and increase of emulsifiabllity in use of highly refined viscous hydrocarbon oils, which comprises adding thereto about 0.04% of pyro allol. v

5. A ighly refined white viscous hydrocarbon oil free from asphaltic constituents and containing, a small proportion of an aromatic compound having a plurality of hydroxyl groups attached to the ring.

6. A highly refined white viscous hydrocarbon oil free from asphaltic constituents and containing. up to 0.1% of an aromatic compound having a plurality of hydroxyl groups attached to the-ring. 7 A highly refined white viscous hydro- 8. Alli hly refined white viscous hydrocarbon oi free from asphaltic constituents and containing about 0.04% of pyrogallol.

In witness whereof, I havehereunto set m hand this 29th day of October, 1928.

- THOMAS H. ROGERS;

1. The method of preventing'acid forma tion and increase of emulsifiability in .use

carbon oil from asphaltic constituents and containmg a small proportion of pyrogallol.

I loo 

